and, of course, marvin kalb, who is the edward r. murrow professor emeritus at harvard kennedy school of government. and a contributing news analyst for npr and fox news channel. antaeus wrigley called upon to comment on major issues of the day by many other leading news organizations. and also he is very dear to our heart here at aspen because he is legally serve as moderator, and done a superb job each time. very happy to have you back, martin. thank you so much. let me just go back and say just a word about the in depth knowledge, skill, dedication and perseverance of each of you present today who worked on the negotiating team for the process that led up to it. really did not just bring this to fruition but also reflect the practice of diplomacy at its best. it required outstanding diplomacy and -- to balance the risks and demands of peace in the sort of opec security environment of the cold war period, which perhaps, perhaps most people to remember but perhaps some do not. so, before turning the program over to marvin though, i